construction in the open inside a cofferdam
A safety protection device for a bridge pier (1) comprises a steel boxed cofferdam (2) arranged around the periphery of the bridge pier (1) and a hydraulic station (7) fixed relative to the steel boxed cofferdam (2).
A flap-type movable lid (6) is disposed on the top end (18) of the temporary cofferdam structure (1).
Once all the blocks (3) are connected, a U-shaped rubber gasket (21) is set on an end part (17) of the temporary cofferdam structure (1) to form the temporary cofferdam structure (1).
Then, the interior space enclosed by the temporary cofferdam structure (1) and the wall surface (68) of the dam (69) is drained.
rock-filled double-wall coffer dam
double-wall wood coffer dam
A bulwark (16) makes it possible to connect by floating the energy-spillway structure to the concrete dam.
A barrier forming a temporary dam that may be erected quickly alongside a river in spate to protect a flood-prone area.
Disclosed is a sheeting board that may uniformly disperse bending moment of soil pressure applied to a rear side of the sheeting board and firmly support inserts of a lamination connection support plate without driving a wedge into a groove of H beam.
The substratum (14) further comprises a drainage system including a bulkhead (30) formed of the ceramic disposed between the first layer of the moisture absorbent ceramic (16) and the second layer of the moisture absorbent ceramic (20).